The term 'highly perceptive' can be described by the crossword solutions ASTUTE (6 letters), KEEN (4 letters), and ACUTE (5 letters). ASTUTE means having or showing an ability to accurately assess situations or people and turn that understanding into a successful action. KEEN refers to having or showing quickness of perception, understanding, or intellect. ACUTE is defined as having or displaying a sensitive insight or understanding. All three words describe someone who is highly perceptive, meaning they are able to quickly and accurately understand their environment and the people in it.